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When laser light which has been scattered off a rough surface falls on another surface, it forms an “ objective speckle pattern ”.
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When and laser
When the particles are in great motion, they produce a Doppler shift for measuring wind speed in the laser light, which is used to calculate the speed of the particles, and therefore the air around the anemometer.
: When an LED-like structure is contained in a resonant cavity formed by polishing the parallel end faces, a laser can be formed.
When an optical amplifier is placed inside a resonant optical cavity, one obtains a laser oscillator.
When the modulation rate is on time scales much slower than the cavity lifetime and the time period over which energy can be stored in the lasing medium or pumping mechanism, then it is still classified as a " modulated " or " pulsed " continuous wave laser.
When law enforcement agencies are using machine pistols in non-concealed settings, this makes it feasible to add accessories such as optical sights, laser sights, flashlights, forward handgrips, rear stocks, or sound suppressors.
When the laser printer engines themselves cost over a thousand dollars the added cost of PS was marginal.
When it came to the confrontation with both Avengers teams, the Savage Land natives, and the heroes from the ship, Mister Fantastic and Abigail Brand used a laser to identify the heroes from the ship as Skrulls.
When a beam is measured with a laser beam profiler, the wings of the beam profile influence the D4σ value more than the center of the profile since the wings are weighted by the square of its distance, x < sup > 2 </ sup >, from the center of the beam.
When refracted by a diffraction-limited lens, a Gaussian beam is transformed into another Gaussian beam ( characterized by a different set of parameters ), which explains why it is a convenient, widespread model in laser optics.
When an image is formed of a rough surface which is illuminated by a coherent light ( e. g. a laser beam ), a speckle pattern is observed in the image plane ; this is called a “ subjective speckle pattern ” – see image above.
When a laser printer or copier is operated for a long period of time in a small, poorly ventilated space, these gases can build up to levels at which the odor of ozone or irritation may be noticed.
When the Germans arrive, Liz and Simon are initially captured, but then escape and succeed in helping young Frank Skinner carry out Traynor's orders to destroy the secret apparatus – a prototype laser weapon – before the Germans can seize it.
When the centrioles are irradiated by a laser, mitosis proceeds normally with a morphologically normal spindle.
When enough water is collected to make a single drop, it drips from the bottom, falling into the laser beam path.
When a CD is played, there is no physical contact involved, and the data is read optically using a laser beam.
When coherent light from the laser strikes a pit the material glows, giving off incoherent light of a different wavelength.
When Mira and XR fired a laser at his Plasma Monster form, he destabilized enough to the brink of explosion.
When molten lava begins pouring into the hollow from the hole they created, Iverson has to exit the craft to restart the ship's laser before the lava reaches the ship and makes repairs impossible.
When more than one longitudinal mode is excited, the laser is said to be in " multi-mode " operation.
When only one longitudinal mode is excited, the laser is said to be in " single-mode " operation.
When placed in a laser cavity, a saturable absorber will attenuate low-intensity constant wave light ( pulse wings ).
When the condition cleared up, she was left with extensive scarring, which she later successfully cleared by means of laser treatment.
When Oxyd stones are hit by a marble, laser beam, or certain types of moving brick, they open to reveal a coloured circle.
When the bead is displaced from the beam center ( right image ), the larger momentum change of the more intense rays cause a net force to be applied back toward the center of the laser.
When and light
When the light went their way, they went on across the street.
When he was inducted into the Army at Fort Knox, Ky., Hansen's weight had dropped to 180 -- `` too light for me to be at my best '' he said.
When quoted unqualified, it usually refers to some appropriate average across the spectrum of visible light.
When the light from a heated material was passed through a prism, it produced a multi-colored spectrum.
When she made it, the results, starring Margaret Rutherford, were popular and successful light comedies, but were disappointing to Christie herself ; nevertheless, Agatha Christie dedicated the novel The Mirror Crack'd from Side to Side to Rutherford.
When the telescope is at position E it must be oriented toward spot S ′ so that the star light enters the telescope at spot S ′.
When the wind blows horizontally, it presses on and moves the ball ; because ping-pong balls are very lightweight, they move easily in light winds.
When Congress overrode his veto, the project had its green light and ground was first broken in 1991.
When light is sent through the sample, it is backscattered by the particles / droplets.
When exposed to sunlight, artificial light, or infrared radiation ( even the heat of a hand nearby can be enough ), the vanes turn with no apparent motive power, the dark sides retreating from the radiation source and the light sides advancing.
When the radiometer is heated in the absence of a light source, it turns in the forward direction ( i. e. black sides trailing ).
When looking at a cross section of a beam of light, the length over which the phase is correlated is called the transverse coherence length.
When open, doors admit people, animals, ventilation, and light.
) When Thomas Young first demonstrated this phenomenon, it indicated that light consists of waves, as the distribution of brightness can be explained by the alternately additive and subtractive interference of wavefronts.
When writing solo passages for the bass in orchestral or chamber music, composers typically ensure the orchestration is light so it doesn't obscure the bass.
When an electron in an excited molecule or atom descends to a lower energy level, it emits a photon of light equal to the energy difference.
When Loki, god of mischief and strife, murdered Baldr, god of beauty and light, he was punished by being bound in a cave with a poisonous serpent placed above his head dripping venom.
When light is sent through the sample, it is backscattered by the droplets.
When the frequency of the strobe equals the frequency of the rotating or vibrating object, the object completes one cycle of oscillation and returns to its original position between the flashes of light, so when illuminated by the strobe the object appears stationary.
When moving from a denser medium into a less dense one ( i. e., n < sub > 1 </ sub > > n < sub > 2 </ sub >), above an incidence angle known as the critical angle, all light is reflected and R < sub > s </ sub > = R < sub > p </ sub > = 1.
When light makes multiple reflections between two or more parallel surfaces, the multiple beams of light generally interfere with one another, resulting in net transmission and reflection amplitudes that depend on the light's wavelength.
When this material condenses in the rain, it forms dust and light sandy materials that resembles ground pumice.
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